available7591http://www.pbs.org/wnet/nature/ocean-giants-video-on-the-hunt-for-herring/7591/2200766820cove7591On the Hunt for HerringKiller whales use a herding call to help hunt a school of herring.2012-02-21 23:01:00publishdisabledshow11322Invasion of the Killer Whales A shift in power is taking place at the top of the world. http://www.pbs.org/wnet/nature/invasion-killer-whales-full-episode/11322/2014-11-19 01:00:00http://www.pbs.org/wnet/nature/files/2014/11/naat-invasion-killer-whales-top-image-1920x1080-480x270.jpg2365371591cove11165Killer Whales Attack Pod of NarwhalKiller whales pin down an entire pod of narwhal in shallow water. http://www.pbs.org/wnet/nature/invasion-killer-whales-killer-whales-attack-pod-narwhals/11165/2014-11-19 01:00:00http://www.pbs.org/wnet/nature/files/2014/11/narwhal_hunt_top_image-e1415394076242-480x270.jpg2365363790cove